<!DOCTYPE html>
<!--
Take frames coming from various sources and check that:
- VideoEncoder can encode frames without resizing
- VideoEncoder can change bitrate and frame size
- VideoEncoder can encoder frames while resizing to the new width and height
-->
<html>

<head>
  <title>Encode test</title>
  <script src="webcodecs_common.js"></script>
  <script type="text/javascript">
    'use strict';
    async function main(arg) {
      // Use 16x16 aligned resolution since some platforms require that.
      // See https://crbug.com/1084702.
      const width = 640;
      const height = 480;
      const frames_in_one_pass = 15;
      let errors = 0;
      let chunks = [];
      let decoder_configs = [];

      const encoder_config = {
        codec: arg.codec,
        hardwareAcceleration: arg.acceleration,
        width: width,
        height: height,
        bitrate: 1000000,
        framerate: 24
      };

      TEST.log('Starting test with arguments: ' + JSON.stringify(arg));
      let support = await VideoEncoder.isConfigSupported(encoder_config);
      if (!support.supported) {
        TEST.skip('Unsupported codec: ' + arg.codec);
        return;
      }

      let source = await createFrameSource(arg.source_type, width, height);
      if (!source) {
        TEST.skip('Unsupported source: ' + arg.source_type);
        return;
      }

      const init = {
        output(chunk, metadata) {
          if (metadata.decoderConfig)
            decoder_configs.push(metadata.decoderConfig);

          chunks.push(chunk);
        },
        error(e) {
          errors++;
          TEST.log(e);
        }
      };

      let encoder = new VideoEncoder(init);
      encoder.configure(encoder_config);

      for (let i = 0; i < frames_in_one_pass; i++) {
        let frame = await source.getNextFrame();
        encoder.encode(frame, { keyFrame: false });
        frame.close();
        await waitForNextFrame();
      }

      TEST.log('First pass completed');

      // Reconfigure on-the-fly. Use 16x16 aligned resolution since some
      // platforms require that. See https://crbug.com/1084702. 720x576 is
      // the maximum supported by AVC level 3.0.
      encoder_config.width = 720;
      encoder_config.height = 576;
      encoder_config.bitrate += encoder_config.bitrate / 2;
      encoder.configure(encoder_config);

      for (let i = 0; i < frames_in_one_pass; i++) {
        let frame = await source.getNextFrame();
        encoder.encode(frame, { keyFrame: false });
        frame.close();
        await waitForNextFrame();
      }

      await encoder.flush();
      encoder.close();
      source.close();

      TEST.assert(
        decoder_configs.length >= 2,
        'There should be 2 configs, for each configure()');

      TEST.assert(
        chunks.length == frames_in_one_pass * 2,
        'Output count mismatch: ' + chunks.length);

      TEST.assert(errors == 0, 'Encoding errors occurred during the test');
      TEST.log('Test completed');
    }
    addManualTestButton([{
      'source_type': 'offscreen',
      'codec': 'avc1.42001E',
      'acceleration':'prefer-software'
    },
    {
      'source_type': 'offscreen',
      'codec': 'avc1.64001E',
      'acceleration':'prefer-hardware'
    }]);
  </script>
</head>

<body>
</body>

</html>
